bool IsMostUseful() const { return usability & USABILITY_MOST_USEFUL; }
bool IsEquipable() const { return usability & USABILITY_EQUIPABLE; }
bool IsCursed() const { return usability & USABILITY_CURSED; }
bool IsMostUseful() const { return usability & USABILITY_MOST_USEFUL; }
bool IsEquipable() const { return usability & USABILITY_EQUIPABLE; }
bool IsCursed() const { return usability & USABILITY_CURSED; }